Rivet setting machine



April 1937- J. GUALTIERE RIVET SETTING MACHINE Filed April 20, 1936 3 Sheets-Sheet l I MI Ill/l/lll" INV ENTOR 7;? (fzzlz'zztr fizzalzz'ei'e /14]. Row? M ATTORNEYS April 1937- J. GUALTIERE 2,078,660

RIVET SETTING MACHINE Filed April 20, 1936 3 Sheets-Sheet 2 "lll " INVENTOR f/ ZZZ/my film/16 22 m A'ITORNEY April 27, 1937. J. GUALTIERE 2,073,650

RIVET SETTING MACHINE Filed April 20, 1936 a Sheets-Sheet :s

M ATTORNEYS Patented Apr. 27, 193'? STATES PATENT QFFIQ RIVET SETTING MACHINE Application April 20, 1936, Serial No. 75,364

7 Claims.

The present invention relates to a rivet setting machine of the type more especially adapted to set prong rivets.

The rivet feed of the present machine is substantially a straight feed in which the rivets leave the feed hopper with the prongs upward and are turned over in the feed line to the vertical, the main axis is inclined, in such manner that the rivets are delivered to the setting head with the prongs downward.

The construction of the machine comprises light weight sheet metal parts, as to the feed mechanism, thereby reducing inertia of the operating parts and thus decreasing the labors of the operator.

The machine is also designed to be simple in operation and economical to manufacture.

Fig. l is an elevational view of the machine with the front of the machine toward the left.

Fig. 2 is an elevational View of the operating head of the machine with the head facing toward the right.

Fig. 3 is a plan view of the feed hopper, rivet chute, and operating links therefor.

Fig. 4 is a detail view of the operating means for the feed cup looking in the direction of the arrow A, Fig. 1.

Fig. 5 is a detail view of the setting head and rivet pocket showing a portion of the setting head in section, and with the setting head lowered into the rivet holding cup.

Referring now more especially to Fig. 1, the main frame I is bolted on a pedestal frame 2 which is provided with a base 4. An operating treadle 5 is mounted on pivot 6 carried by the base frame 4. A coil spring 1, secured to the treadle 5 and the pedestal frame 2, normally retains the treadle 5 raised against the upper stop screw 8 and the treadle 5 is arrested in its downward movement by the lower stop screw 9 in the base 4.

The main frame l carries a bell crank lever [0, the lower end of which is attached to a pair of toggle links H and I2, with the link [2 being mounted on the pivot M in the main frame I. A power link l5 connects the center of the toggle links H and 12 with the treadle 5 so that when the treadle is depressed, the toggle links H and i2 are straightened and the bell crank I0 is turned counterclockwise (Fig. 1). The bell crank lever I9 is mounted on a shaft l6 carried by the upper end of the main frame I and this bell crank at its forward end carries a stub shaft ll which is provided with a cross T-slot within which the head l9 (Fig. 5) of the plunger 20 is mounted. The opening 23 in the end of the bell crank IQ is of sufiicient size to permit the head l9 to be slipped into the T-slot in the stub shaft ll. When the bell crank lever i0 is operated to force the plunger 29 downward, the head i9 slides in the T-slot as the stub shaft I! rotates. The plunger 20 is mounted for vertical reciprocation within the plunger guide 2! which comprises a cylindrically bored portion of the upper arm 22 of the main frame 1. The plunger 29 is provided with a longitudinal opening 24 in which a setting head 25 is mounted by means of a tapered upper end 26. The stub shaft i7 is provided with an opening 21 and the upper end of thebell crank over the stub shaft 2'! is likewise provided with an opening 28 so that a punch or other suitable tool may be inserted through the openings 28, 21, and 24 to knock out the setting head 25 to permit the change of setting heads whenever this may be desired. A collar 29 is slidably mounted on the upper end of the plunger 20 and carries cup spring arms 39 and 3| which terminate at their lower ends in rivet cup members 32 and 3 3 through which the setting head 25 passes to force a rivet from between the cup members 32 and 3t during the rivet setting operation.

The cup spring arms 39 and 3| are reenforced by leaf springs 35 and 36 which are also carried by the collar 29 and bear against the cup spring arms 30 and SI. The cup spring arms 30 and 3| are guided in vertical slots 37 in the sides of the plunger guide 2 l The back of the cup spring arms 30 and 3! just above the cup spring members 32 and 34 are provided with a recess 38 (Figs.

1 and 2) to receive the lower end of the lower guide chute 39. The lower part of the recess 38 comprises a shoulder 49 which is normally maintained raised against the end of the lower guide chute 39 by a plunger M which is pushed upward against the collar 29 by means of a coiled spring 42.

A feed lever 44 is mounted on a pivot 45 on the main frame I. This feed lever it is provided with a slot 33 in which a cross bar 4'5, carried by the lower arm of the bell crank I9, is adapted to slide. When the bell crank i8 swings c0unter-clockwise (Fig. 1), as the treadle 5 is depressed, the upper end of the feed lever it is swung clockwise. A rod link 48 is provided with a circular eye that is carried on a pin 69 in the I upper end of the feed lever 34, and the lower end of the link 48 is attached to the rivet cut off 53 (Figs. 1 and 3). When the feed lever i t at its upper end swings clockwise, the rivet cutoff 50 swings counter-clockwise (Fig. 3) to release one rivet in the straight channel 5! of the lower guide chute 39, and to block rivets above the cut-off 5i in this channel. This operatic-n is brought about by the lip 52 on the cut-off 50 which releases a single rivet when the cut-off is oscillated in a counter-clockwise direction, and the curved portion 54 which swings across the channel 5i to block the passage of the line of rivets in the channel 5! above the cut-off member. Another rod link 55 is provided with a circular eye which is also connected with the stub shaft lil on the upper end of the feed lever id. The link rod 55 extends upwardly to a flat link 56 (Figs. 1 and 4) which is mounted to rotate around the feed cup shaft 5? that carries the feed cup 53. The flat link 56 carries a ratchet pawl 59 that is retained in engagement with a ratchet wheel Eli by means of a spring (El which is attached at one end to the flat link 58 and at the other end to the ratchet pawl 59.

The ratchet wheel (ii) fits upon the flattened end 62 of the feed cup shaft 57 so that as the ratchet wheel 68 is intermittently moved through the operation of the feed lever M, the rod link 55, and the ratchet pawl es, the feed cup 58 is intermittently rotated by the friction of the triangular spring 5 which is held in frictional engagement With the feed cup 58 by the thumb screw :55, in a manner disclosed in Stimpson and Gualtiere Patent No. 1,997,438, patented April 9,

A feed hopper 65 is provided with a throat 61 which leads into the feed cup 58 so that rivets dropped into the mouth of the hopper 65 feed into the feed cup 58 and as the feed cup is intermittently rotated, as described, the rivets 68 feed outwardly through the feed openings in the rim of the feed cup 58 into the circular channel 855 (Fig. 3) which is adjacent the rim of the feed cup 58. A barrier rim lil (Fig. 3) formed integral with the back plate 'N (Fig. i) is positioned close to the rim of the feed cup, opposite to the circular channel 69, in order to prevent escape of rivets from any portion of the rim other than the side adjacent the circular channel E9.

It will be observed from Figs. 2 and 3 that the rivets 68 arefed into the circular channel 69 in inverted position with their prongs upward and it will be observed from Fig. 2 that the setting head requires that the rivets shall be turned over with their prongs downward whenthey reach the setting station. In order that this operation may occur an inclined channel l2 leads from the circular channel 69 to a spiral channel Hal. This spiral channel it is formed by the edges of a pair of sheet metal members 15 and 761 which are riveted to a channel plate H. A rod member [8 (Figs. 2 and 3) is riveted within the sheet metal members 35 and i6 and is of such diameter as to provide adequate clearance for the heads of rivets 58 as they slide by gravity down the spiral channel i l into the straight channel 5i provided in the lower guide sheet-39. The rivets in the lower guide sheet 39 are blocked by the lip 52 of the cut-off 58. When the machine is operated, the setting head forces the rivet from the cup members 32 and 3% against the anvil 86 which is carried by the lower arm 3! of the main frame 6. This anvil 80 cornprises the upper end of a machine screw 82 which is screw threaded into the boss 84 on the lower arm 85, of the frame 5, and is locked in position by the lock nut 85. The anvil 80 when utilized with prong rivets is provided with 21.

spreading cone 86 which causes the prongs or the rivets to spread .outwardly as they are squeezed between the anvil 8D and the end of the setting head 25. During the descent of the setting head 25, the rivet cut-off 58 operates to release one rivet from the straight channel 5! which fallsby gravity to the lower end of the channel and is blocked by the setting head 25. As the operator releases pressure on the treadle 5 theysprin'g I raises the treadle and restores the part to normal position. During this time, the setting head 25 rises above the prong rivet 68 in the lower end of the channel 5i and the rivet 68 drops. between the cup members 32 and to be held in position as indicated in Fig. 2 ready for the next setting operation.

It is to be understood that the channels 69, 12, I4, and 5| are sufficient in width to pass the body of a rivet 68, but are of less width than the head of such rivet, as is well known in the art.

The feed hopper 66, the back 63 for the feed cup 58, the frame work for the inclined channel 12, the spiral channel 14, and the terminal channel 5i areformed of sheet metal and are riveted together to comprise an entity forming a rivet feed channel member. This rivet feed channel member is held on the machine frame I at its upper end by the feed cup shaft 51, which extends through a boss 53 on the main frame i, and at its lower end by a plate 13 which is attached by machine screws 83 to the side of the upper arm 22 of the main frame I.

From the foregoing, it will be observed that the removal of the thumb screw 65, the removal of the machine screws 83, and the disconnecting of the rod link '48 from the cut-off frees the rivet feed channel member so that it may be removed as an entity from the machine. This rivet feed mechanism extends from the top of the main .1

frame I diagonally downwardly and forwardly to the front of the machine on the middle vertical plane of the machine and the bell crank lever 10 is recessed at (3 to provide an accommodation for the rivet feed chute.

The machine above described is a very simple, inexpensive, sturdy mechanism for manually riveting materials together which can be readily pierced by prongrivets.

Having described my invention, what I claim 1. In a rivet setting machine, the combination of a feed cup for rivets, a hopper to lead a supply of rivets to said feed cup, said cup being adapted to feed inverted rivets from the rim thereof with the heads of the rivets downward, a pair of sheet metal plates secured together at one edge and a rod mounted between said plates and separated therefrom to comprise a feed chute having a spiral portion to turn said inverted rivets over as said rivets pass down said chute by gravity, rivet setting means, and means to release said turned over rivets one at a time to said setting means.

2. In a rivet setting machine, the combination of a feed cup adapted to feed inverted rivets from the rim thereof, a pair of sheet metal plates secured together at one edge and a rod mounted between said plates and separated therefrom to comprise aspiral chute to turn said inverted riv ets over, a terminal chute having a rivet channel substantially on the axis of said spiral chute, rivet setting means, and means to release said turned over rivets to said rivet setting means.

3. In a rivet setting machine, the combination of a frame, a rivet setting plunger mounted to reciprocate in an arm of said frame, a collar carried by and slidable on said plunger, cup springs on said collar, each end of said cup springs comprising one half of a rivet cup, said cup springs comprising guides for said collar, a rivet feed chute terminating adjacent said rivet cup, and means operative on said collar to hold said rivet cup in operative relation to said chute whereby 10 rivets from said chute are delivered to said rivet cup.

4. In a rivet setting machine, the combination of a feed chute for rivets, a cut-off at one end of said chute, a feed cup at the other end of said 15 chute, a feed lever, a single link directly connecting one end of said feed lever with said cutoff, means to intermittently rotate said feed cup, a single link directly connecting the same one end of said feed lever with said means, rivet set- 20 ting means, and operating means for said feed lever operatively connected with said rivet setting means to cause said feed lever to operate said cut-off and to partially rotate said feed cup during each cycle of operations of said machine.

5. In a device of the class described, an article of manufacture comprising a feed hopper, a pair of sheet metal plates secured together at one edge and a rod mounted between said plates and separated therefrom to comprise a spiral channel member, and a terminal channel member, said feed hopper and said members being united to form a single machine element.

6. In a rivet setting machine, the combination of a feed chute for rivets, a cut-off at one end of said chute, a feed cup at the other end of said chute, a bell crank lever, toggle mechanism for operating said bell crank lever, a setting plunger on one end of said bell crank lever, a feed lever connected to the other end of said bell crank lever by a sliding rotating connection, a link connecting said feed lever with said outwit, intermittently operating means for said feed cup, and a link connecting said feed lever with said intermittently operating means.

7. In a rivet setting machine, a setting plunger, said setting plunger having a head which is T-shaped in cross section, a plunger operating shaft, said shaft being provided with a T-shaped slot to receive the head of said setting plunger, and operating means carrying said shaft.

JULIUS GUALTIERE. 

